[feature] Add color option to pattern layout.
Based on #90 this implements the possibillity to add the color codes
according to the log level via %[ and %].
Merge pull request #101 from Dignifiedquire/feature-color-pattern

[feature] Add patternColoured Layout.
New version, with colours in pattern layout
Added syntax highlighting to JS code in README.md
Merge pull request #105 from ulikoehler/readme-syntax-highlighting

Added syntax highlighting to JS code in README.md